How to draw a Quadratic/Polynomial graph when you have the equation

Question

How to draw a Quadratic/Polynomial graph when you have the equation

Anonymous

Hello all, I hope you can help me, as this problem is driving me up the wall!

I have a series of quadratic (2nd Order polynomial) equations that I want to plot as a graph.

For example, I have one which is -0.078x^2 +22.59x - 125.52 between the x-values of say 0 and 180

Is there a way to do this? Any help would be greatly appreciated.

Thank

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Answer 1

Anonymous

Formula in A2 is: =-0.078*A2^2+22.59*A2-125.52

best wishes

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Answer 2

> I have one which is -0.078x^2 +22.59x - 125.52 between the x-values of say 0 and 180

Hi. A slightly different way is to pick 3 points for a polynomial.

A good axis for your range might be 0, 50, 100. (or 0, 100, 200)

Use the equation to get the y value.

Do a scatter chart, but select the choice that does "Not" connect the lines.

Now, add the polynomial Trend line. Forecast it out another 80 points to get to 180.

The idea here is that you can extend the graph forward and back without having to add any additional calculated cells. Just the 3 cells above. :>)

Answer 3

Anonymous

Hi,

an alternative option, through geogebra app. and spreadsheet.

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Answer 4

Anonymous

Another alternative to Excel is Microsoft Mathematics 4 - a free application.

best wishes

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How to draw a Quadratic/Polynomial graph when you have the equation

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